uct_ib_mr_type_t

[EmmaLee-c]

typedef enum {
/* Default memory region with either strict or relaxed order /
UCT_IB_MR_DEFAULT,
/ Additional memory region with strict order,
* if the default region is relaxed order */
UCT_IB_MR_STRICT_ORDER,
UCT_IB_MR_LAST
} uct_ib_mr_type_t;

What does ‘UCT_IB_MR_STRICT_ORDER’ mean，why call ibv_reg_mr registration twice when UCX_IB_PCI_RELAXED_ORDERING=on?
Thanks!

[yosefe]

When need to send remote atomic operations, it should be done to a strict-pci-order memory key, to maintain atomic semantics